Pile-cutter for looms.



E. H. RYON.

PILE CUTTER FOR LOOMS. APPLICATIONI'FILED JULY 21,1916.

1,220,687 Patented Mar. 27; 1917.

3 SHEETS-SHEET 1- IIlIl|II|IIII|lIllIIIII|IIHIIIIIIIIIIIIIIIIIH @D ummm E. H. RYON. PILE cu T FOR Looms. APPLICATIO D VJULY 27| 1916.

Patented Mar. 27,

3 SHEETS-SHEE 3 Mmmm wire;

A3 FFT i i EPPA H. RYON, 0F WALTHAM, MASSACHUSETTS, ASSIGNOR T0 CROMPTON & KNOWLES SETTS.

.L CORPORATTGN OF MASSACHU- PILE-CUTTER FOR LOMS.

Application led July 27, 1916.

To aZZ whom t may concern.:

Be it known that T, 1li-TA H. RYON, a citizen of the United States, residing at Wah tham, in the county of Middlesex and State of Massachusetts, have invented a new and useful File-Cutter for Looms, of which the following is a specification.

This invention relates to a pile cutter for looms of a type .adapted for use with 'a grooved pile wire. Itis the object of my invention to improve the construction of such pile cutters, and to render them more effective in operation.

In my present invention an important feature relates to the provision of a plurality of cutting edges on a pile cutter of the type specified and also to the provision of suitable devices for successively moving said edges into operative posit-ion. Another feature of my invention relates to the provision of means for sharpening said edges while they `are removed from operative position. Provision is also made for moving each cutting edge to inoperative position at the end of a cutting stroke, and for moving a succeeding edge into operative position at the beginning of the next cutting stroke.

My invention further relates to certain ar rangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of my invention is shown in the drawings in which# Figure 1 is a top plan view of a portion of my invention;

Fig. 2 is a front elevation of the parts shown in Fig. 1;

Fig. 3 is a front elevation of certain parts positioned at the opposite side of the loom;

Fig. 4 is a side elevation of the parts shown in Fig. 3, looking in the direction of the arrow 4 in said figure;

Fig. 5 is a sectional elevation taken along the line 5-5 in Fig. 2;

Fig. 6 is a detail view 'of one end of a ile Fig. 7 is a detail plan viewof the opposite end of the wire; Y

Fig. 8 is a plan view of the actuating connections, and

Fig. 9 is a detail sectional elevation taken on the line 9 9 in Fig. 1.

Referring to the drawings, a bar 20 is shown mounted above the fabric in a loom Specification of Letters Patent.

Patented Mar. 2?, 191'?.

Serial No. 111,732.

two sets of screws the bar may be adjusted and securely held in its vertical position.

0n its ,front edge the bar 20 is undercut to form a guide way 20L along which a carrier 30 is freely slidable. This carrier is pivotally connected to a link 31 which eX- tends to the right in Fig. 1, and is secured to a reciprocating member 32 (Fig. 8) by means of a screw 33 extending through a slot 34 in the link 31. This stud and slot connection permits a certain amount of lost motion between the reciprocating actuating member 32 and the carrier 30.

Anarm 35 is pivoted at 36 to the carrier 30, and is yieldinglv held in the position shown in Fig. 1 by a spring 37 which engages an extension 35a of the arm 35. An adjusting screw 38 constitutes a stop which limits the movement of the arm under the iniiuence of the spring 37.

A. ratchet wheel 40 is pivotally secured to the arm 35 by a shouldered stud 41 which extends through the arm and is secured thereon by a nut 42. A disk knife 43 is secured to the ratchet wheel 40 as by a pin 44 (Fig. 5) and is provided with a'plurality of cutting edges 43a, 43", 4.3c and 43d. While the knife 43 is shown herein as having four cutting edges, it will be understood that this number is not essential, and that anydesired number may be provided The teeth of the ratchet wheel are positioned for engagement by a flat spring 45 (Figs. 1 and 3) secured to thetop of the arm 35 by a screw 46, and adapted to retain the ratchet wheel in the position to which it is advanced by the feeding mechanism. t

This feeding mechanism will now b'e described. and comprises a pawl 50 pivoted upon a stud 51 and vieldingly engaging the ratchet wheel 40 under the influence of a spring 52. The stud 51 is mounted upon one arm of a member 53 pivoted upon a and retained thereon by the nut 42, the

.projection 35b being concentric with the stud 41. The member 53 is provided with oppositely` disposed portions 54 and 55 poand with a spring 65 connected to the arm 35 and normally pressing the lug 53aagainst the stop pin 64.

The parts are so'positioned that the rod 56 will engage the` arm 54 as `the flatter approaches its left-hand limit of travel, thereby actuating the pawl and moving the ratchet wheel 40. As the ratchet is provided with two teeth forV each cutting edge, the edge 43a will be moved to the inoperative position Y shown in Fig. 2, and at the same time the succeeding edge 43b will be advanced toward operativeV position. Both edges will be left,

' however, inthe inoperative position shown in Fig. 2 While theY carrier is making its idle stroke tothe right. As the carrier approaches its lright-hand limit of travel, the arm 55 of the member 53 will be engaged by y, the bunter 57, and the edge 43b will be advanced to cutting position.

The construction'of the pile wire is best 'shown in Figs. 6 and 7, and comprises a rod having a groove 7l formed therein, and having a head 72 secured to one end thereof. The head is'provided with a cam-like surface 72a fora purpose to be described. vAt

' the opposite end the rod 70 is bent slightly forward'so that it cannot engage and damage the reed Vwhile being inserted in the warp, The operative edge 43a of the knife V43 extends into the groove 7l of the rod 70 and Y coperates therewith in cutting the pile P., AsV the knife completes its cutting movement the apertured head 72 is engaged byY a hook 32a upon the actuating member 32, and isY withdrawn thereby upon the next movement of the actuator to the right. The

Y withdrawal of thepile wire precedes the return of the cutter to its original position, owing to the lost motion'providedV in the connection between the link 3l and the actuator 32. A guide 73 (Figs. 1 and- 9) holds [the -pile wire 70 in alinement Vwhile it is withdrawn by themember-53. This guide is secured to the stand 59 and is adjustable thereon. The arm 35 is provided with a depending'projection 35,a which is adapted to project between the rows of pile loops and to engage the most advanced of the pile wires.

YThe projection thus assists in alining the Vcutting edge with the pile wire, and in retaining the parts in operative relation during the cutting stroke.

As soon as the cutter reaches the left-hand side of the loom, the cutting edges are turned to the inoperative position shown in Fig. 2, and the wire from which the loops have been cut is immediately withdrawn. The swinging arm 35 then moves backward under the pressure of the spring 37 until the projection 35a engages the next succeeding pile wire or the loops formed thereover. This engagement continues during the advance of a new knife edge to cutting position and until the new pile wire is withdrawn after the completion of the cutting stroke. The cam surface 72a upon the head 72 assists in guiding the cutting edge into the groove 71 of the pile wire 7 0.

It is found that the cutting edges in such mechanism soon become dull, and I have provided new and original devices for sharpening the edges automatically without removing the same from the loom. For this purpose I secure a rod to a bracket 81 mounted on the bar 20, and on this rod I pivotally support a pair of members 82 and V83, each provided with an abrasive surface S4. Stop pins 85-85 mounted in collars 86 limit the motion of the members 82 and 83 in opposite directions, in which directions said members are yieldingly pressed by springs S7 secured in collars 8S adjustable on the rod 80 to vary the tension of the springs. The stops 85 position the members 82 and 33 so that the abrasive surfaces 84 will engage the opposite faces of the cutting edge 43C, as the edge 43n approaches the end of its operative movement.

It will thus appear that I have provided a cutting mechanism coperating with a grooved pile wire and having a plurality of cutting edges which are alternately moved to operative and inoperative positions, and that while said edges are inoperative, provision is made for sharpening them in readiness for the neXt operative movement.

Having thus described my invention it will be evident that changes and modifications can be madetherein by those skilled in the art without departing from the spirit and scope thereof as set forth in the claims, and I do not wish to be otherwise limited to Ythe details herein disclosed, but what I claim is l. A pile cutter having in combination, a rotatable disk having a lplurality of separated cutting edges, means to actuate said disk intermittently to advance said edges successively to operative and inoperative positions, means to retain said disk in successive positions, and a grooved pile wire coperating withrthe operatively positioned cutting edge.

2. A pile cutter having in combination,

a knife having a plurality of cutting edges, means to move one of said edges to inoperative position at the end of the cutting stroke, and means to move a succeeding edge to operative position at the beginning of the next cutting stroke.

3. A pile cutter having, in combination, a disk having a plurality of cutting edges, a ratchet secured to said disk, a pawl for said ratchet, and actuating means for said pawl at each side of the loom, whereby said ratchet and disk are advanced intermittently to alternating operative and inoperative positions of the cutting edges.

4. In a loom, a iXed bar, a carrier slidable on said bar, an arm pivoted to said carrier, a knife having a plurality of cutting edges mounted on said arm, and means to move said knife intermittently to operative and inoperative positions of said cutting edges.

5. In a pile cutter, a knife having a plurality of cutting edges, a carrieron which said knife is supported, means to move said knife intermittently to operative and inoperative positions of said cutting edges, and means to retain said knife in position and to prevent backward movement thereof.

6. A pile cutter comprising a knife having a plurality of cutting edges, means to move said knife to successive operative and inoperative positions of said edges, and means to sharpen said edges while inY inoperative position.

7. A pile cutter comprising a knife having a plurality of cutting edges, means to move said knife to successive operative and inoperative positions of said edges, and sharpening devices comprising abrasive surfaces mounted to yieldingly engage one of said edges on both sides while in inoperative position.

8. A pile cutter comprising a knife having a plurality of cutting edges, means to move said knife to successive operative and inoperative positions of said edges, and means to sharpen said edges while in inoperative position, said means comprising a supporting rod, members having abrasive surfaces mounted to swing on saidrod and adapted to engage said knife on opposite sides of a cutting edge, stops to limit said swinging movement, and springs to force said members toward each other.

9. A pile cutter having, in combination, a carrier, a knife mounted on said carrier and having a plurality of cutting edges, means to reciprocate said carrier, and separate means positioned adjacent opposite sides of the loom and each effective to ad- Vance said knife to a succeeding position as said carrier approaches its limit of travel in either direction.

10. A pile cutter having, in combination, a rotatable knife having a plurality of cutting edges, and devices fixed adjacent each end of the path of travel of said knife, each effective to advance said cutter angularly through one half of the angle between succeeding edges.

In testimony whereof I have hereunto aiixed my signature.

EPPA I-I. RYON.

@opten of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

